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Top 10 laboratory measurements related to the diagnosis of the cause of fever of unknown origin.
| Number | Top 10 laboratory measurements |
| 1 | Percentage of basophils |
| 2 | Percentage of large unstained cells |
| 3 | Age |
| 4 | Fibrinogen level |
| 5 | Thrombin time |
| 6 | Alkaline phosphatase level |
| 7 | Direct bilirubin level |
| 8 | Blood sodium level |
| 9 | 24-hour urine volume |
| 10 | Lymphocyte count |
